Die-casting machine.



J. K. STEWART.DECD. P. mimosa. ADMINISTRATOR.

DIE CASTING MACHINE.

APPLICATION FILED JAN- 5. H5. 13231 ,808, Patented July 3; 1917.

a SHEETSSHET 1.

@ 171 if, tewarfi' a? Q "mm-Kama J. KJSTEWART, DECD; P- c. Liumansn,Abnlnlsnuron.

DIE cAsTmG MACHINE. APPLICATION HLED m4. 5. me. v

' Patented July 3, 1917.

5 SNEETFSNEE'I' 3.

1. K. STEWART, own. P.'C Lmuaiuu mmmsmnon.

DIE CASTING MACHINE.

APPLICATION FILED JANJ. I916- V Patentd July 3; 1917. 5 $NEET$-5IIEET Q.

JET) an];

1. k. STEWART, 05610. P- C- LIN DGRENY ADMINISTRATOR- DIE CASTINGMACHINE. APPLICATION FILED mus. ISIS- 1,231,808. Patented July 3, 1917.

5 SHEETS-SHEET 5.

U D STATES PATENT cur os.

JOHN K. STEWART, OF CHICAGO, ILLINOIS; PHILIP G. LINDG-REN,ADMINISTRATOR F SAID JOHN K. STEWART, DECEASED.

DIE-CASTING MACHINE.

To all whom it may concern:

-Be it knownthat I, JOHN K p STEWART,

a citizienof the United States, residing at' Chicago, in the county ofCook and State of Illinois, have inventednevv and useful I111.provements in Die -'Casting Machines, of which the following is :9.Specification, reference being had to the accompanying drawings, forminga part thereof.

i It is the purpose of this invention to provide a. diecasting machinein which the n1ajority of operations are automatic and are mechanicallytimed Withrelation to one another, whereby the process as a whole may beperformed at'considerablygreater speed than is now possible. Theinvention consists in the features and elements of the in achine andtheir combinations hereinafter de scribed and shown in the drawingsindicated by the claims.

' In the drawings:

Figure 1 is a side elevation of a die casting machine embodying thisinvention. v Fig. 2 is atop plan view of thesainc, with certain partsbroken away to reveal. details of construction.

Fig. 3 is an enlarged detail section taken substantially indicated atlnic 3-3 on Fig. 2;

Fig. 4: is a. detail plan section. taken principally as indicated at 44: on. Fig. 1..

Fig. 5 is a detail. section taken as indicated at line 5- 5 on Fig.

Fig. 6 is a'dctail. section. taken as indicated at line 6 6 on 3.

Fig. 7 is a detail section taken asindi :atcd

at line 7-7 on Fig. 3.

Fig. 8 is a detail section taken as indicated at line 8--8 on Fig.

Fig. 9 is Dim] view' of a melting pot and rotary table constructed toembody a modification of the ineaims for moving the limiting pot Well ascertain other features not sl'mwi'l, in previous figures.

The machine illustrated in thedrzuvings comprises the combination of asingle melting pot, 1., with a plurality of dues or molds, 2, mountedupon a rotary carr1er,3,' soas Specification of Letters Yatent.

ing the casting. eludes head plate, a, connected to the table Fig. 1.0 adctail'seotion talcen as indi-.

Patented July 3, 1917.

to be successively registered and connected With the discharge nozzle,4, of the melting pot, l, to be filled with molten metal. The meltingpot, 1, is very similar in construction and operation to that which ismore fully described in nay (ac-pending applicw tion Serial No. 6252i,filed "November 20th, 1915. The di ,2, may be of the usualconstriilction compiising an. upper and a lower half, and 2,respectively, each. provided with a sunblock, 2"", having suitablyarranged conduits for cooling Water for cool The rotary carrier, d, in-

portion, 3, by upright guide rods, 6, which also serve as guides for thecross heads, 7, upon WIT h the upper portions, 52, of the dies, 2, arecarried. This assembly is 'li'ota tively mounted upon. a stationary postor column, 8, as quite clearly indicated in Fig. 3.

It should be understood that the rotary carrier, 3, is intermittentlyrotated through a given angle and held at rest for a given time forsuccessively filling the several] or molds, 2, at the single nozzle, theg lnelting pot, 1. The pmvcr for other in this intermittent motion ofthe rotary or .r transmitted through a constantly M sting power shaft,9, having a Worm, 10, meshing with a WOIljl'll wheel. or gear, 11.,jouriuilcd to rotate about the post, 8, on which the die carrier is alsorotatahly nioun .1. The in tcrniittent motion oil the rotzzury carrieris accomplished by gearing involving the called. Geneva stop Iniucip'lc,and con of three gears, 12, 13 and ii, all. me. with a single pinion,15, as indicate in Fig. 8. The gear 14:, is a ccmiplcte spur gem andoperatively connm l f I the table. 3, by pins, tal, 3, of said table. Simachine shown there are touron the table, 3, each rotative increment ofthe table is a quarter turn of and to accomplish this the pinion, 15,made with one fourth the number of teeth of the gear, 1 L Thegcars, 1 2and 13, really GOI'ISLJI. its a single gear in operation, being" made intwo parts only for convenience 1n nntniilfacture but being securedrigidly together so as to rotate together. This combination forms "amutilated gearhaving the same", number'of teeth as the pinion, 15, andthis 18 I l toothed portlon the gear 13, 1s a plain c1rmutilated gear isconnected for rotation :yith the worm wheel, 11, by means of dowel pins,17; But as the rotation of the worm gear, '11, brings the teeth of thegears, 12

and 13, into mesh with the teeth of the pinion, 15, said pinion will begiven one complete revolution, and this movement.

transmitted to the gear, 14, will result in a quarter revolution of saidgear and of the table,'3, connected therewith. Beyond its cular plate ofthe diameter of the gear, 14, [minus its teeth, that is, of the diameterof its dedendum circle, so that after its teeth have caused the onecomplete revolution of the pinion, 15, its circular portion will justpass clear of the teeth of the pinion, 15, allowing it to remain at restfor three- .quarters of the revolution of the gear, 13. 'Thegear, 12, issimilar to the 'gear, 13, ex-

cept that its circular portion, that is, threequarters of its periphery,coincides with the addendum circle of its teeth; in other words,

it 1s a circular plate, having a series of notches cut in one quarter ofits periphery equal in number to the teeth of the pinion, 15, andarranged to register with the spaces between theteeth of the gear, 13.To accommodate the plain circular portion of the gear member, 12, thepinion, 15, is notched at 15, such notch being circular-in form to fitclosely the circular outline of the member, 12, thus preventing thepinion, 15, from rotating while its notch, 15, is in registration withthe circular portion, 12, of the member, 12, but in no Wise interferingwith r0 tation of the pinion, 15, when the teeth of the gear members, 12and 13, arein registration and engagewith the teeth of the pinion, 15.The result is that as the power shaft, 9, is continuously rotateddriving the worm gear, 11, through the worm, 1 0,-each complete rotationof said worm gear, 11, causes a quarter turn of the gear, 14, and thecarrier table, 3, associated therewith; but such quarter turn of thetable, 3, takes place at the same speed as the rotation of the- -'wormgear, 11, and the table, 3, remains stationary for the succeedingthree-quarters of the revolution of the worm gear, 11, be-

ing infact locked against rotation by-the engagement of the notch, 15,with the blank circular portion, 12, of the member, 12, asabove-described. I I

Because of possible backlash, however, in the gears of'the Geneva stopcombination this gearing is not to be relied upon to stop the,

- carrier, 3, with the-dies, 2, accurately registered with the dischargenozzle, 4-, of the melting pot, 1; the periphery of the table, 3, istherefore provided with a series of short abutments, 18, one for, eachset of dies on the carrier, and each adapted to engage a correspondingabutment, 19, on the melting pot as the die comes to registeringposition.

, It should. be explained that the melting pot,

l, is mounted for limited reciprocation upon guide rods, 20, suchreciprocation being effected by means of a follower, 21, engaging a cam,22, which is continuously rotated by its cam shaft, 23, having a wormgear, 24, meshing with a worm, 25, on the shaft, 9. In what may becalled its normal position the abutment, 19, of the melting pot, 1,extends in the path of the abutment, 18. Just prior to'the discharge ofmolten metal from the melting pot, 1, into the die,2, the cam,

22, causes the melting pot, 1, to move toward the die, 2, for closeengagement of its nozzle, 4, with the inlet opening of'the die. Justafter the discharge of metal has been completed the cam, 22, causes themelting pot to move back away from the die, 2, sufli- -ciently toentirely disengage its abutment,

19, from "he abutment, 18, and this occurring just as the teeth of thegears, 12 and 13, come into mesh with the teethof vthe pinion, 15,permits the carrie'rtable, 3, to make its next quarter-turn movement tobring the next die into registration with the nozzle, 4, on the meltingpot, 1. During this movement the cam, returns the melting pot and itsabutment, 19, to normal position ready to engage the next abutment, l8,and interrupt rotation of the carrier table, 3, at the proper point.Itwill be seen that these movements can be very accurately related byreason of the positive gear connection of both the melting pot, l, andthe rotary carrier, 3, with the same power shaft, 9.

It should be explained that strictly speaking the cam, 22, does noteffect the movement of the melting pot, 1, but permits such movementunder the influence of heavy compression springs, 26, shown in Figs. 1and 2. The pressure of these springs against the rotary table, 3, isabsorbed by a roller, 27, carried-on a bracket, 28, in position .toengage segmental finished surfaces, 3", of a flange, 3, formed on theunderside of the table, 3.

The interior construction of the melting pot, 1, may be substantiallysimilar to that shown in my application Serial No. 62524, which includesan approximately U-shaped conduit somewhat resembling a hollow crankshaft whose hollow trunnions communicate respectively with the dischargenozzle, 4, and the compressed air pipe, 29, while the portion of theconduit offset from said trunnions is formed with an intake port throughwhich it may receive the molten metal when said, port is submergedtherein in the melting pot, 1. Asmore fully described in my saidapplication'this U-shaped conduit is rotated through a limited angle onits trunnions for closing its intake port against a valve whose stem isseen at 30, on Fig. 1. Such movement of the conduit is effected by abell crank, 31, connected yieldingly to a link, 32, through a spring,33, and operated fsw-ings up the ported portion of the conduit forclosing of its port by the valve whose stem, 30, appears in Fig. 1; anda slight I further movement of the bell crank, '31,

' which is permitted by the yielding spring connection, 33, with thelink, 32, causes its 1 third arm, 31, to depress the valve plunger,

stood that the quantity of moltenmetal. thus temporarily isolated in theUshaped movable conduit in the melting pot, 1, will he ample for-fillingthe mold of the die, 2. It

will also be seen that since the operations just described arecontrolled by the cam, 35, on the same shaft, 23, which carries the cam,'22, such operations will be properly timed to occur while the nozzle,4, is closely and,

80 forcibly engaged with the intake mouth of the die, 2.

The full capacity of this machine is four dies but the presence of fourdies. is not necessary to the o eration of the machine;

it may be used, ii -desired, with only one, two orthree dies. When oneor more dies is omitted, however,it is necessary to pre .vent the.discharge of molten metal from the nozzle, 4:, at times when there areno 40 dies present to receive it. For this purpose the air supply pipe,38, leading to the valve, 37, is provided with a second valve, 39,

whose plunger, 40, is positioned for actuation 1 by cam abutinents, 41,removably applied to the outer surface of the flange, 3, of the table,One of these cam abutmcnts, 41, is positioned on the flange, 3, directlybelow each of the dies, 2, carried. on the table, 3, so that as each diecomesinto registration with the nozzle, l, the cam, 41, depresses theplunger, 40, and opens the air valv'e, 39, admitting air under pressureas far as'the valve, 37. If one of the dress is removed from the table,3, however, its corresponding cam j- '56 abutment, 41,18 removed-fromthe flange, 3,

- 0 that when the table,3 stops at the position at which the removeddie, 2, would otherwise engage the nozzle, 4, the valve, 39, is

Knot opened, andalthough the bell crank, 31, 130 goes through itsregular movement, including even the operation of the valve, 37, no

metal is discharged through the nozzle, 4, i j because the compressedair is held, in check at. the valve, 39. .This simple expedientof '05 Tremoving the cam member, 41,;whenits cor-1 the horizontal arm of thebell crank, 31,

"responding die, 2, is removed thus makes it possible to operate themachine at less than full capacity whenever it is desired to do so. i r

- As previously mentioned, the upper half,

2 of each die is carried by a cross head, 7,

mounted to reciprocate vertically upon the. guiderods, 6, which connectthe table, 3, Q

with the head plate, 5.. lhe cross head, 7,

includes a threaded stem, 7, permitting ac curate. adjustment to'varioussizes of (lies, such stem, 7, being connected by links, 4:2, with crankpins, 43, carried by the'flanges, 44, formed. at either end ofthespurgear, as, which is journaled in brackets, 46, hung 0 from thehead plate,5. Connecting with each of the spur gears,'45, is a rack, 47, mountedfor radial reciprocation on the under side of the head plate, 5, andcarry ing atits inner end a follower roller, 48, 5; engaging the grooveof'a cam, 49, which is fixed to the stationary post or column, 8,

upon which the head plate, 5,rotates with.

I registrationwith the nozzle, l, of the melting pot and for receivingthe molten metal therefrom. As the carrier rotates to move 1 the diewith 1ts casting away from the, filling position, the canrgroove, 48,causes the-rack bar, 47, to travel outward, whereupon the upper-diemember, 2 is raised'away from the lower member, 2 so that the casting inthe mold can be removed. This open relation of the dies is thenpreferably maintained until just before they return .for

registration with the nozzle, 4, to receive another casting, thus givingopportunity for an attendant not only to remove the casting but also toclean the dies if necessary before" they are refilled, and in some casesto reset core members in the mold or to insert parts of different metalwhich are to be embodied 1n. the finlshed casting. 5

To render the casting removable from the dies as quickly as possible itis chilled by i'neans of cooling water flowing through suitably arrangedducts in the sub-plates or blocks, 2, which secured in contact withtheir respective members of the die, 2.. In

the ordinary die casting machine, however,

it is very easy to'ruin a casting by unskil-" ful management of the.cooling water; in the present machine it is the purpose to keep the diesat as nearly a uniform temperature as possible, and to accomplish thisthe cooling. Water is so controlled as to flow through the sub-plates,2, only part of the time, and

principally duringthe timewhen the die'is occupied by the hot casting.The cooling water is thus controlled by means of relatively rotatingvalve members, 50 and 51, mounted on the stationary post, 8, which ishollow and through which the water supply and return pipes, 52 and 53,respectively, extend for communication with the valve members, 50 and51. Asshown in Fig. 3, the upper threaded ends of both pipes, 52 and 53,are screwed into a connecting block, 54, fixed in the hollow post, 8, asby a screw, 55, and havingtwo ducts, 54: and 54*, leading respectivelyto channels, 50 and 50 in the valve member, 50. Supply and return pipes,56. and 57, respectively, connect each of the sub-plates, 2, with theouter valve member, 51. As indicated in Fig. 6, the return pipes, 57,simply open to the inner cylindrical surface of the valve member, 51, sothat they register with the continuous, annular groove,

' 50", of the inner valve member, 50, and thus communicate continuouslywith the return pipe,r53. Each supply pipe, 56, however, connects with acircumferentially eX-tended mouth in the valve member,.51, occupyingabout 15- of its inner circle, while the groove, 50*, in the inner valvemember ex- .tends over about 60 in circumferential direction. Thus itwill be seen that each of the; supply pipes, 56, is in temporarycommunlcation with the supply pipe, 52, during I through the sub-plates,2, of the die members just as said die members are closed torim havingcam notches, 3, corresponding gether and come into registration with thenozzle, 4, such flow being continued and maintained during the fillingof the dies with the molten metal, and until they are rotated out ofregistration with the nozzle, 4, and opened to permit removal ofthecasting.

Fig. 9 illustrates a modified constructi n in which the table indicatedat 3 is made to serve the purpose of the cam, 22, and fol-" lower, 21,shown in Fig. 1, and previously described. The table, 3, is formed witha in number to the number of dies to be carried by the table and adaptedto coiiperate with a roller, 1, mounted uponthe end of the melting pot,1". The melting pot, 1*, is

unounted as in the principal construction,

upon guide rods, 20, provided with compression springs, 26, tending toforce the melting pot, 1", toward the table, 3", for

connection of its nozzle, 4, with the inlet of one of the dies on thetable.

ortions of the rim of the table which occur etween successive notches,3, will serve b cooperation with the roller, 1, to holdthe Theconcentric tion with the roller, 1, to permit the advahce of theiheltingpot, 1, under pressure of the springs, 26. The notch, 3*, may be deepough in relation to the size of the roller,,1 to serve also as acentering means forquite accurately relating the rotary table, 3,-to thenozzle, 4", of the melting pot, said table being driven by theGenevastop gearing described in connection with the principal constructionshown in Fig. 1. Thus it may be understood that while the cam shaft, 23,and its cam, 35, may still be required to actuate the internal parts ofthe melting pot, 1*, in a manner already de scribed, the reciprocationof the melting pot will be provided for by a rather simpler mechanism.

Fig. 9, together with Figs. 10 and 11, also shows means for cleaning theface of the nozzle, 4", after each discharge therefrom to insure betterconnection between said nozzle and the next die to which it is todeliver the molten metal. Such means consists of a rotary brush, 58,carried on a vertical spindle, 59, journaled in the table, 3 ,-andpartially shown in preceding views ina position intermediate of each twodies thereon. Thus for the particular machine shown, there are fourbrushes, 58. Mounted on the melting pot for movement therewith is aplate,

60, formed with a segmental gear, 61, which i .ter of any solidifiedparticles of the metal which may have been deposited thereon in the lastpreceding casting operation. Pref erably, as will be seen by referenceto the arrow, A, indicating the direction of rota tion of the table, thebrushes, 58,. are arranged to rotate so that their peripheral travelagainst the nozzle is in the direction opposite to that of the table,thus securing the maximum brushing effect.

Fig. 12 illustrates a modified form of control for the air valve, 37 toprevent effective actuation of-said valve when one set of dies isomittedfrom the table, 3. The third arm,

31, of the bell crank, 31, connects yieldingly instead of positivelywith the valve lever, 36, througha compression spring, 63, and the leveris formed with a stop shoulder, 36, in whose path may be interposed thethe discl lever, 36. It will be understood that when the block, 65, isabsent a retracting spring, 66, removes the rod, fi l, from the path ofthe shoulder, 36, and the compression spring, 63, being much strongerthan the retracting spring, 67, the valve lever is actuated to open thevalve, 37, and admit air to the melting pot in the usual manner.

1, The combination of a melting pot, a discharge nozzle therefor, aplurality of dies or molds ea'ich adapted for connection with which saiddies are mounted symmetrically about the axis of rotation, and means forimparting automatically intermittent rota tlon to said carrier formovlng such dies. successively into and out of registration with saidnozzle. I

2 The combination of a melting pot, a

discharge nozzle therefor, a plurality of dies or molds each adapted forconnection with the discharge nozzle, a rotary carrier on which saiddies are synunetrlcally disposed with respect to the axis of rotation,at power member, and gearin including a Geneva stop motion operativelyconnecting said ower member with said rotary carrier for impartingintermittent rotation to the carrier to move the dies successivelyintoand out of registration with said nozzle.

3. The combination of a melting pot, a discharge nozzle therefor, aplurality of dies or molds each adapted for connection with thedischarge nozzle, a rotarycarrier upon which said dies are arrangedsymmetrically about the axis of rotation, a power/member, gearir "fincluding a Geneva stop motion con necting said power member with sa1drotary carrier for imparting intermitten. rotation thereto to move saiddies success vely into.

rate registration of said dies with the nozzle.

4. The combination of a meltingpot having a discharge. nogzle and meansfor forcing plurality of connection with such molten metal therefromunder pressure, a dies or molds each adapted ior discharge nozzle, a

rotary carrier upon which said dies are disposed symmetrically about theaxis of r'otation, a. power shaft and gearing connecting :9

said shaft with said carrier adapted for imlarge nozzle, a rotarycarrier 011" parting intermittent rotation to the latter for moving thedies successively into and out otregistration with said nozzle controldevices for such metal discharging means, and actuating mechanism forsaid control devices also geared to said power shaft whereby the rotaryadjustment of the carrier and the discharge of the metal from themelting pot are automatically timed with relation to each other. i

5. The combination of a melting pot having a discharge nozzle, aplurality of dies or molds each adapted for connection with saiddischarge nozzle, a rotary carrier upon which said dies are mountedsymmetrically about the axis of rotation, means for intermittentlyrotating said carrier for moving the dies successively into and out ofregistration with the sald nozzle, means for intermittentlyreciprocating said melting pot for moving the nozzle into and out ofcontact with said dies, said carrier having a series of abutmentscorresponding respectively to the dies on the carrier, and said meltingpot having a coiiperating abutment normally positioned to arrest therotation of the carrier for effecting accurate registration of thenozzle with one of the dies, the abut ment on the meltin pot beingdimensioned to withdraw from t e engagement with the abutment on thecarrier when said melting' pot is reciprocated in direction; or separating the nozzle from the die.

6. The combination of a melting pot'having a discharge nozzle, a supplof compressed air, for discharging molten metal therefrom underpressure, a valve controlling said compressed air supply, a plurality ofdies or molds each adapted for connection with such discharge nozzle, acarrier on which sa1d.d1es are mounted adapted for I moving themsuccessively into and out of registration with said nozzle, and means removably and replaceably mounted on the die carrier at angular intervalsabout its axis, corresponding to the angular intervals between the diesthereon for controlling the openings of the air snpply controlling valvein accordance with the number of dies which are present on the carrier.i

7 The combination of a melting pot having a discharge nozzle, a suppl ofcompressed air for discharging mo ten metal therefrom under pressure, aplurality of dies or molds each adapted for connection with suchdischarge nozzle, a rotarycarrier upon which said dies are. disposedsymmet rically about the axis of rotation, means into and outof'registration with said nozzle,

a valve controlling the compressed'air supply, and a. plurality of camabutments removably mounted on thecarrier' in proper relation to therespective dies thereon for controlling the opening of said air valve inaccordance with the dies present on the carrier.

8. The combination of a melting pot, a discharge nozzle therefor, aplurality of dies or molds each adapted, for connection with thedischarge nozzle, a carrier for said dies mounted for moving themsuccessively into and out of registration with said nozzle, said diesbeing provided with ducts for cooling fluid, and a valve device operatedby the movement of the carrier and controlling the admission of coolingfluid to said ducts of the dies, said valve device being adapted toermit circulation of the cooling fluid in suc ducts of each die onlywhile the die remains in the vicinity of the said discharge nozzle ofthe melting pot.

9. The combination of a melting pot having a discharge nozzle, aplurality of dies or molds each adapted for connection with suchdischarge nozzle, a rotary carrier on which said dies are mountedsymmetrically about the axis of rotation, each of said dies being formedwith ducts adapted to receive cooling fluid, a hollow stationary postupon which the carrier is mounted for rotation, supply and return pipesfor cooling fluid disposed in said post, the post having portscommunicating with said pipes respectively, an annular valve memberconnected to the carrier for rotation therewith around the portedportion of the post, said valve member having ports correspondingrespectively to the dies on the carrier and parts connecting said portswith their respective dies, such ports in the valve being positioned forregistration with the corresponding ports of the post whereby therotation of the carrier controls the supply of cooling fluid to thedies.

10. The combination of a melting pot having a discharge nozzle, aplurality of twopart dies or molds each adapted for connection with thedischarge nozzle, a rotary carrier on which said dies are mounted, andmeans for imparting intermittent rotation to said carrier for movingsaid dies successively into and outof registration with said nozzle,together with means on the carrier for supporting one part of each dieindependently of the other part, and mechanism for reciprocatingsuchsupporting -mcans for separating or closing together the two partsof the die, such mechanism including actuating means controlled by therotation of the carrier adapted for closing and holding closed the twoparts of each die while such die is in the vicinity of the dischargenozzle, and ar lapted to cause separation of the two parts of such diewhen the latter is removedcfrom the discharge nozzle by rotation of thecarrier.

11. The combination of'a melting pot, a discharge nozzle therefor, aplurality of dies by the melting or molds each adapted for connectionwith the discharge nozzle, and a-carrier for said dies mounted formoving them successively into and out or registration with said nozzle,together with a brush on the carrier positioned "between successive diesthereon and adapted to wipe the end of the nozzle after disengagement ofone die and before engagement of the next die therewith.

12. The combination of a melting pot, a discharge nozzle therefor, aplurality of dies or molds each adapted for connection with thedischarge nozzle, anda carrier for said dies mounted for movin themsuccessively into and out of registrati n with said nozzle, togetherwith a rotary-brush on the carrier positioned to wipe the nozzle as ittravels past the latter when the carrier moves, and means for rotatingthe brush in direction for causing peripheral travel thereof against thenozzle opposite the direction' of movement of the carrier.

13. The combination of a melting pot, a discharge nozzle therefor,- aplurality of; dies or molds each adapted for connection with thedischarge nozzle, a rotary carrier on which said dies are mountedsymmetrically about the axis of rotation, and means for impartingintermittent rotation to said carrier for moving such dies successivelyinto and out of registration with said nozzle, together with a rotarybrush journaled on the carrier between successive dies and positioned towipe the discharge nozzle, on said brush, and a gear segment carriedsaid gear as the rotation of thecarrier moves the brush past thedischarge nozzle.

14. The combination of a melting pot, a discharge nozzle therefor, aplurality of dies or molds each adapted for connection with thedischarge nozzle, a rotary carrier upon which said dies are arrangedsymmetrically about the axis of rotation, a power member,gcaringincluding a Geneva stop motion connecting said power member withsaid rotary carrier for imparting intermittent rotation a gear pot inposition to mesh with thereto to move said dies successively into andout of registration with the nozzle, togather with centering meanscarried by said melting pot, and adapted for arresting the carrier atpositions for accurate registration of its dies with the nozzle.

15. The combination of a melting pot, a,

discharge nozzle therefor, a plurality of dies or molds each adapted forconnection with the discharge nozzle, a rotary carrier upon which saiddies are arranged symmetrically about the axis of rotation, a powermember, gearing including a Geneva stop motion connecting said powermember withsaid rotary carrier for imparting intermittent rotationthereto to move said dies successively 1nto and out of registration withthe nozzle,

guides on which the melting pot is mounted for reciprocation toward andfrom the axis of the carrier, compression springs tending- .to move themelting pot toward the carrier, said earner lncludmg a notched circularmember, and a follower on the melting pot adapted to engage saidcircular member whereby the melting pot is permitted to advancetowardthe carrier when the follower engages, a notch of said circular member.

16. The combination of a melting pot having a. discharge nozzle, asupply of compressed air for discharging molten metal therefrom underpressure, a valve controlling said compressed air supply, a plurality 01dies or molds eachadapted for connection with such discharge nozzle, 5 acarrieron which said. dies aremounted adapted for moving themsuccessively into and out of registration with said nozzle, a lockingdevice normally inoperative but adapted to preventxtlle opening of saidvalve, and actuating means for said lock adapted to be demountahlysecured to the carrier when one or more of the dies is omitted therefromfor preventing opening of the air Valve in the absence of such dies. a P

In testimony whereof I have hereunto set

